CN112743068A - Lining structure of steel-making emergency steel ladle and building method thereof - Google Patents
Lining structure of steel-making emergency steel ladle and building method thereof Download PDFInfo
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- CN112743068A CN112743068A CN202110046937.2A CN202110046937A CN112743068A CN 112743068 A CN112743068 A CN 112743068A CN 202110046937 A CN202110046937 A CN 202110046937A CN 112743068 A CN112743068 A CN 112743068A
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- ladle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/02—Linings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/02—Linings
- B22D41/023—Apparatus used for making or repairing linings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/04—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like tiltable
Abstract
The invention provides a lining structure of a steel-making emergency steel ladle and a building method thereof, wherein the steel ladle comprises a ladle wall structure and a ladle bottom structure arranged at the bottom of the ladle wall structure; and an inner lining structure comprising a 'well' -shaped prefabricated member arranged inside the wall-wrapping structure; the steel blocks cooled in the emergency ladle can be poured out conveniently; oxygen cutting is carried out along the position of the molten steel overflow port of the aluminum-magnesium precast block, the steel block can be easily divided into seven steel blocks, the gas consumption is small, the time consumption is short, the cutting is convenient, and the steel block is hoisted by a crane and is simple to carry; can meet the requirement of large-tonnage steel ladle steelmaking.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a lining structure of a steel-making emergency ladle and a building method thereof.
Background
The steel-making emergency ladle is used as an emergency ladle or a spare ladle for intensively collecting and treating molten steel/molten iron in an accident state in a steel-making area, and if the problem of unbalanced use of the molten iron and the molten steel occurs in the initial production period of many newly-built steel mills at present or a continuous casting machine fails after molten steel of a converter enters the ladle, the molten steel in the ladle cannot be poured, the molten steel can be poured into the emergency ladle, and the emergency ladle is convenient to treat after cooling. The steel ladle does not participate in normal steelmaking operation, and is only used for temporarily containing and storing molten steel, the high-temperature molten steel is cooled in a steelmaking emergency steel ladle to form a large steel column or a round lump large steel block, the emergency steel ladle overturns to pour out the steel block, the steel block is recycled, and the steel block needs to be cut into small steel blocks with proper sizes by oxygen before being carried. The requirements of the masonry process and the service life of the steel-making emergency ladle are different from those of a normal production ladle, and the service life of the steel-making emergency ladle is only one time. The emergency steel ladle in the prior art is constructed by adopting a universal arc-shaped brick single layer, and a ladle wall and a ladle bottom are directly constructed by adopting clay bricks and yellow sand. The steel blocks in the small steel ladle emergency steel ladle are small, cutting and carrying are relatively convenient, the structure can meet the use requirements, the tonnage of the steel-making steel ladle is developed to be large-scale along with the development of metallurgical technology, a large number of steel plants begin to use steel ladles with the tonnage of more than 200 tons for steel making, the steel-making steel ladle of the Zhanjiang steel company Limited currently reaches 350 tons, and the steel ladle in the prior art accident can not meet the requirements of the current industry.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
Therefore, the invention aims to overcome the defects that the emergency steel ladle in the prior art is simple in structure and the process of treating the cooled molten steel in the emergency steel ladle is complex, and provides a lining structure of a steel-making emergency steel ladle and a building method thereof.
In order to solve the technical problems, the invention provides the following technical scheme: the lining structure of the steel-making emergency ladle comprises a ladle, a steel-making emergency ladle and a steel-making emergency ladle, wherein the ladle comprises a ladle wall structure and a ladle bottom structure arranged at the bottom of the ladle wall structure; and an inner lining structure comprising a 'well' type preform arranged inside the containment wall structure.
As a preferable aspect of the lining structure of the steel-making emergency ladle of the present invention, wherein: the cladding wall structure comprises a cladding with an axis longitudinal section being U-shaped, a shell permanent layer is arranged on the inner side of the cladding in a clinging manner, a shell working layer is arranged on the inner side of the shell permanent layer, a gap is reserved between the shell permanent layer and the shell working layer, the gap distance is 0-170mm, and magnesia filler is filled in the gap; the permanent layer of the shell is made of a high-alumina casting material with the thickness of 110 mm; the working layer of the shell is built by arc-shaped high-alumina bricks with the thickness of 100 mm.
As a preferable aspect of the lining structure of the steel-making emergency ladle of the present invention, wherein: the ladle bottom structure comprises a bottom shell, a bottom permanent layer is arranged above the bottom shell, and a bottom working layer is arranged above the bottom permanent layer; the bottom permanent layer is made of high-alumina casting materials with the thickness of 200mm, and the bottom working layer is vertically built by square high-alumina bricks with the thickness of 120 mm.
As a preferable aspect of the lining structure of the steel-making emergency ladle of the present invention, wherein: the prefabricated part comprises two long prefabricated blocks and four short prefabricated blocks symmetrically arranged on two sides of the long prefabricated block; the long precast block and the short precast block are longitudinally divided into 4 or 5 same precast block units, the top of each precast block unit is provided with a concave type, the bottom of each precast block unit is correspondingly provided with a convex type for being embedded into a whole, and the joint is provided with aluminum magnesium refractory mortar.
As a preferable aspect of the lining structure of the steel-making emergency ladle of the present invention, wherein: and a molten steel overflow port with the size of 300mm multiplied by 300mm is reserved at the position close to the bottom part below the long precast block and the short precast block.
The invention aims to solve another technical problem of building a steel-making emergency ladle and a lining structure thereof, thereby providing the following technical scheme: a method for building a lining structure of a steel-making emergency ladle is characterized in that on the basis of a ladle shell and a bottom shell, a shell permanent layer and a bottom permanent layer are constructed by adopting high-aluminum castable in a vibration mode, and baking is carried out after construction;
adopting high-alumina brick masonry construction for the shell working layer and the bottom working layer, and filling a gap between the shell working layer and the shell permanent layer while constructing the shell working layer;
the prefabricated part units are built by adopting aluminum-magnesium refractory mortar in the ladle to form a well-shaped prefabricated part;
naturally standing for 24 hours.
As a preferable scheme of the masonry method of the lining structure of the steel-making emergency ladle of the invention, wherein: and (3) constructing the permanent layer, wherein the water adding amount is 7.5 percent of the mass of the castable, and the permanent layer is placed for 24 hours after the construction is finished.
As a preferable scheme of the masonry method of the lining structure of the steel-making emergency ladle of the invention, wherein: the baking is carried out by adopting a ladle roaster and a temperature rising curve of the high-aluminum permanent layer castable with the highest baking temperature of 400 ℃.
As a preferable scheme of the masonry method of the lining structure of the steel-making emergency ladle of the invention, wherein: the construction of the working layer of the shell is that arc-shaped high-alumina bricks are adopted for building, the arc-shaped high-alumina bricks are vertically built, aluminum-magnesium refractory mortar is adopted for building, and the brick joints are controlled to be smaller than 2 mm.
As a preferable scheme of the masonry method of the lining structure of the steel-making emergency ladle of the invention, wherein: the bottom working layer is constructed by adopting square high-alumina bricks, the aluminum-magnesium refractory mortar is adopted for construction, a slurry mixer is adopted for stirring on site, the water adding amount of the aluminum-magnesium refractory mortar is 25.0% of the mass of the aluminum-magnesium refractory mortar, and the brick joint is controlled to be smaller than 2 mm.
The invention has the beneficial effects that: when the steel-making is abnormal, molten steel is poured into the intermediate groove of the long aluminum-magnesium precast block of the emergency steel ladle and uniformly flows into the emergency steel ladle through the molten steel overflow port, the molten steel is directly overturned relative to the emergency steel ladle after being cooled to form a large steel block, the arc-shaped high-alumina bricks on the working layer of the steel ladle wall, the magnesia packing between the permanent layer and the working layer and the square high-alumina bricks on the working layer of the ladle bottom are poured out along with the accident steel block, the steel block is convenient to pour out, oxygen is cut along the position of the molten steel overflow port of the aluminum-magnesium precast block, the steel block is very easily cut into seven steel blocks, the gas consumption is small during cutting, the time consumption. The steel blocks are hoisted by adopting a crane and are simple to carry.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
fig. 1 is a schematic view of the overall structure of the lining structure of the steel-making emergency ladle according to the present invention;
fig. 2 is a plan view of an inner lining structure of a steel-making emergency ladle according to the present invention;
fig. 3 is a half sectional view of an inner lining structure of a steel-making emergency ladle according to the present invention;
FIG. 4 is a schematic view of the connection of the inner precast block units;
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Example 1
This embodiment provides an inner lining structure of a steel-making emergency ladle, as shown in fig. 1 to 4, including,
the ladle 100 comprises a ladle wall structure 101 and a ladle bottom structure 102 arranged at the bottom of the ladle wall structure 101; and an inner lining structure 200 comprising a "well" type preform 201 disposed inside the containment wall structure 101.
The cladding wall structure 101 comprises a cladding 101a with an axis longitudinal section being U-shaped, a shell permanent layer 101b is arranged on the inner side of the cladding 101a in a close fit manner, a shell working layer 101d is arranged on the inner side of the shell permanent layer 101b, a gap 101c is reserved between the shell permanent layer 101b and the shell working layer 101d, the interval of the gap 101c is 0-170mm, and magnesia filler is filled in the gap 101 c; the shell permanent layer 101b is made of a high-alumina casting material with the thickness of 110 mm; the shell working layer 101d is built by arc-shaped high-alumina bricks with the thickness of 100 mm; the bottom wrapping structure 102 comprises a bottom shell 102a, a bottom permanent layer 102b is arranged above the bottom shell 102a, and a bottom working layer 102c is arranged above the bottom permanent layer 102 b; the bottom permanent layer 102b is made of high-alumina casting material with the thickness of 200mm, and the bottom working layer 102c is vertically built by square high-alumina bricks with the thickness of 120 mm.
The high-alumina castable is a cement-bonded castable which takes high-alumina bauxite or mullite as a main raw material, and the volume density is more than or equal to 2.45g/cm3，Al2O3Not less than 60.00 percent and the normal temperature compressive strength not less than 30.0 MPa. Stirring the high-alumina castable by using a powerful stirrer on site, wherein the water addition amount of the high-alumina castable is 5.5-7.5% of the mass of the castable, and performing vibration pouring construction; the high-alumina brick is a phosphate-bonded high-alumina brick with high-alumina bauxite as a main raw material, the arc degree of the arc-shaped high-alumina brick of the ladle wall is the same as that of the ladle wall, and the volume density is more than or equal to 2.45g/cm3，Al2O3The high-alumina brick is built by adopting aluminum-magnesium refractory mortar on site, wherein the high-alumina brick is more than or equal to 65.00 percent, and the normal-temperature compressive strength is more than or equal to 50.0 MPa; the magnesite filler is sintered or fused magnesite with MgO content not less than 92.00% and is crushed into 0-3mm grains. The field is directly filled in the gap between the permanent layer and the working layer of the shell body, wherein the gap is 0-170 mm.
The prefabricated part 201 comprises two long prefabricated blocks 201a and four short prefabricated blocks 201b symmetrically arranged at two sides of the long prefabricated block 201 a; the long precast block 201a and the short precast block 201b are longitudinally divided into 4 or 5 same precast block units 201c, the top of each precast block unit 201c is provided with a concave 201c-1, the bottom of each precast block unit 201c is correspondingly provided with a convex 201c-2 to be embedded into a whole, and the connection part is provided with aluminum magnesium refractory mortar. The aluminum-magnesium precast block is made by baking cement-bonded precast pieces with high bauxite or corundum as main raw material at a temperature of more than 400 ℃ before delivery, and the volume density is more than or equal to 2.65g/cm3，Al2O3+ MgO is more than or equal to 80.00 percent, and the normal-temperature compressive strength is more than or equal to 30.0 MPa; the Al-Mg refractory mud is prepared from superfine alumina clinker or corundum powder, high-quality magnesite and additiveUsing aluminium-magnesium refractory mortar, Al2O3And the + MgO is more than or equal to 82.00 percent, and the bonding rupture strength is more than or equal to 2.0MPa at 1500 ℃ for 3 h. The aluminum magnesium refractory mortar is stirred by a slurry stirrer on site, the water addition amount of the aluminum magnesium refractory mortar is 21.0-25.0% of the mass of the aluminum magnesium refractory mortar, and the aluminum magnesium refractory mortar is constructed by a mortar clamp.
A300 mm x 300mm molten steel overflow port 202 is reserved at the position close to the bottom part below the long precast block 201a and the short precast block 201b, so that molten steel can flow in the emergency steel ladle conveniently.
The beneficial effects of this embodiment: the steel blocks cooled in the emergency ladle can be poured out conveniently; oxygen cutting is carried out along the position of the molten steel overflow port of the aluminum-magnesium precast block, the steel block can be easily divided into seven steel blocks, the gas consumption is small, the time consumption is short, the cutting is convenient, and the steel block is hoisted by a crane and is simple to carry; can meet the requirement of large-tonnage steel ladle steelmaking.
Example 2
A method for constructing a lining structure of a steel-making emergency ladle, as shown in fig. 1 to 4, comprising,
s1, vibrating the permanent layer of the shell and the permanent layer at the bottom by adopting high-alumina casting materials on the basis of the can and the bottom shell, and baking after construction;
s2, adopting high-alumina brick masonry construction for the shell working layer and the bottom working layer, and filling the gap between the shell working layer and the shell permanent layer while constructing the shell working layer;
s3, splicing the precast member units in the ladle by adopting aluminum-magnesium refractory mortar to form a well-shaped precast member;
and S4, naturally standing for 24 hours.
Constructing a permanent layer of the shell by adopting a high-aluminum casting material for vibration construction, wherein the water addition amount is 7.5 percent of the mass of the casting material, and after the construction is finished, the shell is placed for 24 hours and then is demoulded; and (3) constructing a bottom permanent layer, adopting a high-aluminum casting material for vibration construction, adding water in an amount of 7.5 percent of the mass of the casting material, and standing for 24 hours after the construction is finished.
And baking the permanent layer castable by adopting a ladle baking device and a high-aluminum permanent layer castable heating curve with the highest baking temperature of 400 ℃.
Building a square high-alumina brick with a bottom working layer of 120mm thickness by adopting aluminum magnesium refractory mortar, stirring by adopting a slurry stirrer on site, wherein the water addition amount of the aluminum magnesium refractory mortar is 25.0 percent of the mass of the aluminum magnesium refractory mortar, and the brick joint is controlled to be less than 2 mm; building arc-shaped high-alumina bricks with the thickness of 100mm on a shell working layer, wherein the arc-shaped high-alumina bricks are vertically built, the aluminum-magnesium refractory mortar is used for building construction, the brick joints are controlled to be less than 2mm, and a gap is formed between the arc-shaped high-alumina bricks on the shell working layer and a shell permanent layer; when the arc-shaped high-alumina bricks are built, magnesia filler is adopted in the gap between the arc-shaped high-alumina bricks on the working layer of the shell and the permanent layer of the shell.
The aluminum-magnesium long precast blocks and the aluminum-magnesium short precast blocks are spliced by aluminum-magnesium refractory mortar, and a well-shaped precast member structure is formed inside the steel ladle.
After masonry construction is finished, the concrete is naturally placed for 24 hours for use.
When the steel making is abnormal, molten steel is poured into the intermediate groove of the long aluminum-magnesium precast block of the emergency steel ladle and uniformly flows into the emergency steel ladle through the molten steel overflow port, the molten steel is directly overturned corresponding to the emergency steel ladle after being cooled to form a large-scale steel block, the arc-shaped high-alumina bricks on the working layer of the steel ladle shell, the magnesia sand filler between the permanent layer and the working layer and the square high-alumina bricks on the bottom working layer are poured out along with the accident steel block, and the steel block is convenient to pour out. The oxygen cutting is carried out along the position of the molten steel overflow port of the aluminum-magnesium precast block, the steel block is very easily divided into seven steel blocks, the gas consumption is small, the time consumption is short, the cutting is convenient, and the steel block is hoisted by a crane and is simple to carry.
The method is successfully tried out in 210T emergency steel ladles in a steel plant of Guangxi Steel group Limited company; the emergency steel ladle lining is formed by building a cladding, a 110mm shell permanent layer high-alumina casting material, a 100mm thick shell working layer arc-shaped high-alumina brick, a 0-170mm gap magnesia filler, a 200mm bottom permanent layer high-alumina casting material and a 120mm thick bottom working layer square high-alumina brick, and an aluminum-magnesium long precast block and an aluminum-magnesium short precast block are spliced inside the emergency steel ladle lining to form a 'well' -shaped precast member structure.
It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a lining structure of ladle for steelmaking emergency which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the ladle (100) comprises a ladle wall structure (101) and a ladle bottom structure (102) arranged at the bottom of the ladle wall structure (101); and the number of the first and second groups,
the lining structure (200) comprises a 'well' -shaped preform (201) arranged inside the containment wall structure (101).
2. The lining structure of a steelmaking emergency ladle according to claim 1, wherein: the cladding wall structure (101) comprises a cladding (101a) with an axis longitudinal section being U-shaped, a shell permanent layer (101b) is arranged on the inner side of the cladding (101a) in a clinging manner, a shell working layer (101d) is arranged on the inner side of the shell permanent layer (101b), a gap (101c) is reserved between the shell permanent layer (101b) and the shell working layer (101d), the distance between the gaps (101c) is 0-170mm, and magnesia filler is filled in the gap (101 c); the shell permanent layer (101b) is made of a high-alumina casting material with the thickness of 110 mm; the shell working layer (101d) is built by arc-shaped high-alumina bricks with the thickness of 100 mm.
3. The lining structure of a steelmaking emergency ladle as claimed in claim 2, wherein: the bottom wrapping structure (102) comprises a bottom shell (102a), a bottom permanent layer (102b) is arranged above the bottom shell (102a), and a bottom working layer (102c) is arranged above the bottom permanent layer (102 b); the bottom permanent layer (102b) is made of high-alumina casting materials with the thickness of 200mm, and the bottom working layer (102c) is vertically built by square high-alumina bricks with the thickness of 120 mm.
4. The lining structure of a steelmaking emergency ladle as claimed in claim 3, wherein: the prefabricated part (201) comprises two long prefabricated blocks (201a) and four short prefabricated blocks (201b) symmetrically arranged on two sides of the long prefabricated blocks (201 a); the long precast block (201a) and the short precast block (201b) are longitudinally divided into 4 or 5 same precast block units (201c), the top of each precast block unit (201c) is provided with a concave type (201c-1), the bottom of each precast block unit is correspondingly provided with a convex type (201c-2) so as to be embedded into a whole, and the connection part is provided with aluminum magnesium refractory mortar.
5. The lining structure of a steelmaking emergency ladle as claimed in claim 4, wherein: a molten steel overflow port (202) with the size of 300mm multiplied by 300mm is reserved at the position close to the bottom part below the long precast block (201a) and the short precast block (201 b).
6. A masonry method of a lining structure of a steel-making emergency ladle is characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
on the basis of the cladding and the bottom shell, performing vibration construction on the permanent layer of the shell and the permanent layer at the bottom by adopting a high-aluminum casting material, and baking after construction;
adopting high-alumina brick masonry construction for the shell working layer and the bottom working layer, and filling a gap between the shell working layer and the shell permanent layer while constructing the shell working layer;
the prefabricated part units are built by adopting aluminum-magnesium refractory mortar in the ladle to form a well-shaped prefabricated part;
naturally standing for 24 hours.
7. The method of claim 6, wherein the lining structure of the steel-making emergency ladle is: and (3) constructing the permanent layer, wherein the water adding amount is 7.5 percent of the mass of the castable, and the permanent layer is placed for 24 hours after the construction is finished.
8. The method of laying a lining structure of a steel-making emergency ladle according to claim 7, wherein: the baking is carried out by adopting a ladle roaster and a temperature rising curve of the high-aluminum permanent layer castable with the highest baking temperature of 400 ℃.
9. The method of laying a lining structure of a steel-making emergency ladle according to claim 8, wherein: the construction of the working layer of the shell is that arc-shaped high-alumina bricks are adopted for building, the arc-shaped high-alumina bricks are vertically built, aluminum-magnesium refractory mortar is adopted for building, and the brick joints are controlled to be smaller than 2 mm.
10. The method of laying a lining structure of a steel-making emergency ladle according to claim 9, wherein: the bottom working layer is constructed by adopting square high-alumina bricks, the aluminum-magnesium refractory mortar is adopted for construction, a slurry mixer is adopted for stirring on site, the water adding amount of the aluminum-magnesium refractory mortar is 25.0% of the mass of the aluminum-magnesium refractory mortar, and the brick joint is controlled to be smaller than 2 mm.
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| CN202110046937.2A CN112743068A (en) | 2021-01-14 | 2021-01-14 | Lining structure of steel-making emergency steel ladle and building method thereof |
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| CN202110046937.2A CN112743068A (en) | 2021-01-14 | 2021-01-14 | Lining structure of steel-making emergency steel ladle and building method thereof |
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